Tim needs to fill 3 20L barrels with oil. Oil dispenser flows at 100ml/s . How long to fill up 3 barrels.

Please help by showing all steps so I can understand how the answer was determined.
Thanks!

3 answers

3 of the 20 L barrels
= 3(20000) ml
= 60000 ml

at a rate of 100 ml/s
it would take 60000/100 seconds
= ...
10
First determine volume of three containers [3 x 20L = 60L]. Then convert fill rate from mL/s to L/min. Recall 1L = 1000mL and 60s = 1 minute;
100 / 1000 x 60 = 6L/min];
Then divide total volume by fill rate [60 / 6 = 10 minutes]